<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
   <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">

  <title>vuekode</title>
</head>

<body>
  <div id="app"></div>
  <!-- built files will be auto injected -->
  <script>
    let htmlWidth = document.documentElement.clientWidth || document.body.clientWidth;
    let htmlDome = document.getElementsByTagName('html')[0];
    if (htmlWidth > 750) { htmlWidth = 750 }
    htmlDome.style.fontSize = htmlWidth/20 +'px';
  </script>
</body>

</html>
